mus: Remove the old client lib.

services/ui/public/cpp/window_tree_client_delegate.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef SERVICES_UI_PUBLIC_CPP_WINDOW_TREE_CLIENT_DELEGATE_H_
-#define SERVICES_UI_PUBLIC_CPP_WINDOW_TREE_CLIENT_DELEGATE_H_
-
-#include <string>
-
-#include "services/service_manager/public/interfaces/interface_provider.mojom.h"
-#include "services/ui/public/interfaces/window_tree.mojom.h"
-
-namespace ui {
-
-class Window;
-class WindowTreeClient;
-
-// Interface implemented by an application using mus.
-class WindowTreeClientDelegate {
- public:
-  // Called when the application implementing this interface is embedded at
-  // |root|.
-  // NOTE: this is only invoked if the WindowTreeClient is created with an
-  // InterfaceRequest.
-  virtual void OnEmbed(Window* root) = 0;
-
-  // Sent when another app is embedded in |root| (one of the roots of the
-  // connection). Afer this call |root| is deleted. If the associated
-  // WindowTreeClient was created from a WindowTreeClientRequest then
-  // OnEmbedRootDestroyed() is called after the window is deleted.
-  virtual void OnUnembed(Window* root);
-
-  // Called when the embed root has been destroyed on the server side (or
-  // another client was embedded in the same window). This is only called if the
-  // WindowTreeClient was created from an InterfaceRequest. Generally when this
-  // is called the delegate should delete the WindowTreeClient.
-  virtual void OnEmbedRootDestroyed(Window* root) = 0;
-
-  // Called when the connection to the window server has been lost. After this
-  // call the windows are still valid, and you can still do things, but they
-  // have no real effect. Generally when this is called clients should delete
-  // the corresponding WindowTreeClient.
-  virtual void OnLostConnection(WindowTreeClient* client) = 0;
-
-  // Called when the WindowTreeClient receives an input event observed via
-  // StartPointerWatcher(). |target| may be null for events that were sent to
-  // windows owned by other processes.
-  virtual void OnPointerEventObserved(const ui::PointerEvent& event,
-                                      Window* target) = 0;
-
- protected:
-  virtual ~WindowTreeClientDelegate() {}
-};
-
-}  // namespace ui
-
-#endif  // SERVICES_UI_PUBLIC_CPP_WINDOW_TREE_CLIENT_DELEGATE_H_